<div class="menu">
  <button mat-button (click)="changePage('news')">
    <mat-icon>home</mat-icon>
  </button>
  <button mat-button (click)="changePage('ranking')">
    <mat-icon>equalizer</mat-icon>
  </button>
  <button mat-button (click)="changePage('user')">
    <mat-icon>person</mat-icon>
  </button>
</div>
